24-07-2012, 03:01 PM
How Mobile IP Works
MobileIP.pdf (Size: 432.56 KB / Downloads: 25)
Required Background
I am assuming you already know:
the different layers of the OSI model,
what IP and ICMP are,
what ARP, proxy ARP and gratuitous ARP
are,
how IP routing works.
What Problems Does Mobile IP Solve?
An IP address not only identifies a host
but also a point-of-attachment.
Host-specific routes approach suffers
from serious scalability, robustness and
security concerns if applied to the
global Internet.
Design Goals
Mobile IP was designed to make the
size and the frequency of required
routing updates as small as possible.
It was designed to make it simple to
implement mobile node software.
It was designed to avoid solutions that
require mobile nodes to use multiple
addresses.